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Abstract: This paper describes a dimethoate imprinted polymeric potentiometric sensor for the determination of dimethoate that was designed by dispersing the dimethoate-imprinted polymer in dibutyl phthalate plasticizer and then embedded in polyvinyl chloride matrix. The method is based on molecularly imprinted polymer (MIP), which can be synthesized by using dimethoate as a template molecule, chitosan-Cd(II), and 3-mercaptopropyl-trimethoxysilane as a functional monomer and TEOS, and ephychlorohydrin as a cross-linking agent. We have studied a method for the selective binding behavior of dimethoate compounds on the surface of imprinted polymers which is prepared using ligand-exchange (LE) (chitosan-Cd(II)) monomer. The MIP-LE-1 and MIP-LE-2 based membranes have shown a detection limit of 4.3 x 10-6 mmol L-1 and 3.5.10-5 mmol L-1, respectively. The sensor has exhibited a response time of 35min for MIP-LE-1 and 120min for MIP-LE-2. They are stable for more than three months
Template and target information: dimethoate
Author keywords: potentiometric sensor, Dimethoate, MIP, Ion selective electrode, pesticide